Added a test marked as failing for cascades in expression functions.

tests/language/cascade_in_expression_function_test.dart

+// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file

[srdjan, 2012/07/25 00:14:29]

s/2011/2012/

+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+// Dart test program for testing throw statement
+
+class MyClass {
+  foo() => this..bar(3)..baz(4);
+  bar(x) => x;
+  baz(y) => y*2;
+}
+
+main() {
+  var o = new MyClass();
+  Expect.equals(o.foo(), o);
+}